Yesterday, Apple made the announcement that a series of patches were being issued for nearly all of its operating systems, including OS X, iOS, watchOS and Apple TV's tvOS, as well as fixes for iTunes and Safari.

OS X received a total of 67 updates, bringing the operating system El Capitan to version 10.11.5. The update also resolved the DROWN vulnerability that was first discovered in March. This vulnerability could have allowed attackers to leak user information.

Among the 67 OS X patches, 25 address vulnerabilities that could lead to code execution, including 19 issues that could trigger applications to execute code with kernel privileges. Six more could result in arbitrary code execution or application termination, which primarily stem from flaws in graphic standards and frameworks.

Most of the issues that were addressed exist in El Capitan, Apple's most recent operating system. However, Mavericks 10.9.5 and Yosemite 10.10.5 were also affected. Mavericks had 12 security bugs and Yosemite had 14.